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MACRO range installation manual. Issue 6
INTRODUCTION
Thank you for purchasing this unit. We are confident that you have made a wise decision, and that you will have many years of
trouble-free operation. Considerable care has been taken during the design and manufacturing processes to ensure your entire
satisfaction and naturally, we would hope that the unit will perform to our design expectations, though this will be possible only if
the installation is in line with professionally accepted standards and techniques.
This manual is intended, therefore, to ensure that both the installer and operator have all the necessary information to enable them
to install, commission, and operate the unit in the most effective manner. We hope you will find the manual helpful, and easy to
read.
The Company and its quality statement
Mustang Communications, is the manufacturing mark of equipment manufactured by Mustang Communications Limited, of
Scarborough, England. The company is independent, wholly British, and dedicated to the manufacture and distribution of high-
reliability, high performance public address and associated control equipment. Mustang Communications was first registered in
1966, in England.
The Company undertakes to manufacture equipment to the highest standards of workmanship and performance. Our Quality
Assurance scheme operates to, or exceeds, the standards set out in British Standard BS.5750, Part 2. 1987 or European
standard ISO.9002. If you have cause to doubt at any time that the manufacture, or distribution does not comply, then you are
invited to write to us with your comments, which will be most welcome.
Please address your correspondence to The Engineering Director.
The MACRO system concept and applications
MACRO System is a comprehensive range of AC mains and AC mains/24V DC amplification, controls and surveillance units and
associated peripherals, designed for use by emergency services and high integrity communication and alarm systems, manufactured
to the highest standards of electronic and mechanical performance and with Quality Assurance to British Standard BS.5750 AC/
DC equipment is designed to operate normally from 220/240V AC mains, with the capability to operate indefinitely, and without
loss of any facilities, from a standby DC power source (battery system) in the event of mains failure.
Full compatibility within the MACRO range is assured, thus easing system design and enabling fully integrated systems to be
specified using standard MACRO components and options.
The current manufacturing programme features a variety of 8 input mixers, 100 Watt and 250 Watt 8 input mixer amplifiers and
corresponding slave amplifiers, all offered in AC mains only or AC/DC format. AC/DC units provide full AC and DC power integrity
monitoring and indication, and all except mixers feature a trickle-charge circuit as standard. Mixer input versions accommodate
up to 8 modules, selected from the comprehensive range of microphone, line input and alarm tone generator modules. These are
plugged into an internal mother board system which generates 8 levels of ladder priority, equal access priority or any combination
of both. Priorities may be set up easily at system commissioning stage. The module circuits feature various aspects of memory
trigger, priority sinking for use with MACRO zone controllers, remote relays, system busy indicators etc., and such functions are
taken to a rear D connector. Each module is associated with a front panel gain control whose knob and spindle may be removed
at commissioning stage and replaced by a discreet blanking plug to discourage unauthorised tampering. Line driver and stabilised
low voltage PSU facilities are also on plug in modules. Treble and bass tone, and master gain adjustments are internal and pre-
settable.
The amplifier power output stage is in the form of a self contained bolt-on pluggable module for ease of maintenance, and pre-set
adjustment for sensitivity, overload threshold, and bias are featured. Output devices are very robust bipolars and errors on the
module are notified by a front panel LED. Other front indicators are a segmented bargraph output VU, AC (and DC where
appropriate) supply input monitoring, and an illuminated power switch. A soft-start DC switch on circuit is employed. The transformers
employed in MACRO amplifiers are in-house designed and manufactured to the highest standards of tolerance and quality to
maximise the efficiency of the electronics.
Mechanically, MACRO amplifiers utilise a 3U 19" rack mount format with plated steel chassis, contoured aluminium alloy anodised
front/rear panels, chromed handles, nut and bolt fastenings, and connectors are tough locking DIN as standard for signals, D
connector for auxiliary control functions, IEC mains, and military specification 97 series DC input.
By appropriate choice of input modules, the MACRO range of equipment will perform with outstanding results in a multitude of
applications, and a few only are listed under:-
Factory paging, time signals and alarm amplification
Retail stores paging and background music
Theatre show relay and prompt calls etc.
Multi-zone exclusive paging using one amplifier
Shopping centre automatic spot announcements and
security paging etc.
Zoned fire alarm systems
In use the amplifiers will give trouble free and accurate performance, and failure or partial failure is likely to be a result of external
problems with loudspeaker or input cabling etc. The following pages will provide a guide to setting up, operation and maintenance
of the amplifier, but in case of difficulty it would be advisable to consult a qualified dealer or the manufacturer.